There was some sludge at the bottom of the tank.

油箱底有油泥。

《牛津词典》

The tank became bogged down in mud.

坦克陷入了烂泥中。

《牛津词典》

The tank had leaked a small amount of water.

水箱渗漏出少量的水。

《牛津词典》

Jan Filip Stanilko,an analyst at the Warsaw-based Sobieski Institute, a political think tank, explains why the old plans made Poland feel more secure.

VOA: standard.2009.10.22

The military says 54 metric tons of weapons were on board, including missiles, anti-tank weapons and mortars.

VOA: standard.2009.11.04

Terrorism expert Dr.Sajjan Gohel is from the London-based think tank, the Asia-Pacific Foundation.

VOA: standard.2009.12.27

Walker wasn't merely a tailback he was a 6-foot-1, 225-pound nuclear-powered tank who, in three collegiate seasons, rushed for 5, 259 yards and 49 touchdowns.

WSJ: Remembering the Late, Great USFL

The Organisation for Economic Co-operation and Development, a rich country think-tank, isn't expecting a Japanese recovery to start until next year and even then it is expected to be very sluggish.

ECONOMIST: Ready to party?

Tritium would not be very dangerous just sitting in a tank somewhere -it would decay to very low levels of radiation in time.

FORBES: Uranium Stocks Looking Ugly Post-Fukushima As Short-Interest Rises